your course material is poorly presented and full of typographic and other errors, definitely not worth the price you are charging. measurements are given in meters and sometimes in feet, whereas the exam presents all measurements in both feet and meters. distances are variously given in meters, kilometers and nautical miles, with no conversion provided. speed is given in kilometers per hour, with no reference to knots or conversion presented. you do not make proper provision for people on expensive connections, who cannot afford to sit through your videos, and are clearly protecting your material for purposes of profit, with no consideration for others. there is utterly no point in forcing those of us who can read and think faster to sit and wait through your ignorant timers. please get a clue, you greedy scum.